[Sensors] Implement sensor data polling

third_party/WebKit/Source/modules/sensor/SensorProxy.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SensorProxy_h
 #define SensorProxy_h
 
 #include "device/generic_sensor/public/interfaces/sensor.mojom-blink.h"
 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h"
 #include "mojo/public/cpp/bindings/binding.h"
@@ skipping 31 matching lines @@
     void removeObserver(Observer*);
 
     void initialize();
 
     bool isInitializing() const { return m_state == Initializing; }
     bool isInitialized() const { return m_state == Initialized; }
 
     void addConfiguration(device::mojom::blink::SensorConfigurationPtr, std::unique_ptr<Function<void(bool)>>);
     void removeConfiguration(device::mojom::blink::SensorConfigurationPtr, std::unique_ptr<Function<void(bool)>>);
 
+    void suspend();
+    void resume();
+
     device::mojom::blink::SensorType type() const { return m_type; }
     device::mojom::blink::ReportingMode reportingMode() const { return m_mode; }
 
     struct Reading {
         double timestamp;
         double reading[3];
     };
     static_assert(sizeof(Reading) == device::mojom::blink::SensorReadBuffer::kReadBufferSize, "Check reading size");
 
     const Reading& reading() const { return m_reading; }
@@ skipping 26 matching lines @@
     mojo::Binding<device::mojom::blink::SensorClient> m_clientBinding;
     enum State {
         Uninitialized,
         Initializing,
         Initialized
     };
     State m_state;
     mojo::ScopedSharedBufferHandle m_sharedBufferHandle;
     mojo::ScopedSharedBufferMapping m_sharedBuffer;
     Reading m_reading;
+    bool m_suspended;
 };
 
 } // namespace blink
 
 #endif // SensorProxy_h